Material for use in making gears and similar objects



Amis 9, 1929.

ADAMS www@ Patented rger. 5, i929.

Winnaar rif ansias, oirnnnfron, nnonn ISLAND.

MLTERAL FR 'USE l' MAKING GEAZS AND SIMILAR GBJ'ECKTS.

Application filed February 3, 192'?. lSerial No. lft?.

This invention relates te a fibrous compound for use in making gears and similar articles. V@ne Way which has commonly heretofore been employed tor making material for this purpose has beento assemble layers oi textile fabric, either Woven fabric or knitted iiabricrto orm a blanket the` required shape, the layers being saturated 1withl compounds or solutions that are capable oit being converted into hardened insoluble or infusible artificial resin by a suitable treatment and then subjecting the assembly to such treatment. For instance7 a blank Jfor a gear maybe made by assembling in axial relation a plurality of annular or circular pieces of fabric cut `from a web previously saturated With a filler or strength-giving ingredient, suchor instance as synthetic7 condensed or polymerized resin, although any suitable binderor strength-giving element maybe employed7 a suitable number oi these` pieces being used to make a kgear blank ot the desired thickness. lllhere the gear blank is thus made oi layers of Woven textile fabric this tact' and the right-angular arrangement of the Warp and lling threads ol each layer is apt to produce planes of Weakness in the completed article.

li/y present invention has for its object to provide a novel' iib'rous blank which maylbe used for gears or for other articles but which is tree from such lines oi' Weakness and which is so constructed that its inherent strength is uniform in cverydirection with no natural cleavage planes or lines of Weakness.

rlhis end is accomplished by forming a blank from hard fibrous threads or cords which are Wound or assembled to form a blank or article et the desired shape and with the strands oi the cord or thread assembled in layers, each cord having a Zig-zag course in its layer and the strands oi one layer having a diagonal arrangement With reference to they vstrands of the adjacent layer.

A blank having this construction andv Fig. lis a perspective View of a blank embodying my invention;

Fig. 2 is a diagrammatic view illustrating how thestrand or cord may be Wound to form the blank. I f

ln Figui l have shown a cylindrical meniber l which maybe considered as a gear blank and from-Which a gear may be' cut.' This is formed by Winding a; hard twisted cord or thread on a revolving core or center 2, said cord being traversed in the direction of the axis of the revolving core as it is being Wound and also being preferably Wound under a heavy tension.

l? ig. 2 illustratesv diagrammatically ythe manner in which the cord is laid. Each turn `oi' thc cord as it is Wound Will have a zigzag course and the adj acent'turns oit the cord have a parallel arrangement so that the points 3 where the parallel strands or turns l reverse their direction have a progressive position ture with the turns oi" the cord running diagonally.

ln the complete structure the different turns ot the Wound cord are bound together by a oementitious binder of some suitable character7 such 'for instance as synthetic7 condensed or polymerized resin, the cord being saturated with this binder. The complete article may be formed from an unsaturated cord which is passed through an impregnating solution of the binder as the Winding takes place, or the article may be Wound from a previously saturated cord or it may be Wound from a dry unimpregnated cord and the Wound assembly afterwards submitted to proper treatment for saturating it With the binding solution. ln the latter case it Will be preferable to subject the article to the action of a vacuum :for removing the entrained air and then to submit it to proper treatment for saturating it with the cementi- Atious binder. Any desired method of securing complete saturation `of the article may be employed, however, without departing from vthe invention. v

An article made in this way is a compact, solid and dense block 'formed of a spirally and diagonally wound fibrous cord which is bound together by condensed or polymerize resin' or some other suitable binding agency.

A blank such as shown in Fig. l may be machined in any usual way to torni gears or any other objects and because of its internal structure it has great strength and is free from` natural cleavage planes or lines of weakness.

-Gwing tothe great strength ofthe original cord and the various directions in which the fibres run due to the twist in the cord and the diagonal' and recrossing superposition ci the progressively wound layers, the bindingV fibres are extending in every direction and there are no lines or weakness such as might exist in a blank made from layers of woven fabric assembled into cylindrical form wherein the threads, the warp and the filling ot the fabric run in two right angular directions only in each layer.

A blank having a construction embodying my-invention is adapted to resist strain or wear equally well in any direction and it is admirably suited for the formation or gearsv and other similar objects.

l claim:

l. A blank'from which gears may be cut composed of superposed layers eachformed of a plurality of strands ot iibrous hard twisted cord, each strand having a zig-zag course in the layer, the strands in each layer having a diagonal arrangement relative to those of an adjacent layer, said strands being saturated with and bound together under'tension by synthetic resin, andthe whole forming a rigid non-.yielding structure.

2. A blank from which a gear may be cut or various articles may bc made, formed'olf a,

continuous hard twisted ibrous cord wound to present superposed layers each layer having parallel portions of said cord in contact, and with any portion of the cord in one layer lhaving a diagonal arrangement with respect to the portions of the cord with which it contacts in an adjacent layer, said wound cord beingA saturated with and the separate turns thereof being bound together by'a solid cementing composition all portions of the cord being under tension.

Ablank from which a gear may be cut or various articles may be made, formed o'l a continuous -tensioned hard twisted iibrous cord wound to present superposed layers each having parallel portions of said cord in contact and wit-h any portion ot the cord in one layer having a diagonal arrangement with respect to the portions of the Cord with which it contacts in an adjacent layer, said wound cord being saturated with and bound together by synthetic resins. Y y

4. A gear blank composed of a mass oit synthetic, condensed or polymerizeo resins containing continuous layers. of tensioned brous cord, each layer comprising connected parallel vturns having a zigzag arrangement.

5. A blank Composed of a mass of synthetic, condensed or polymerized'resins containing continuous layers of parallel re* versely diagonal wound turns of tensioned fibrous cord.

6. A gear blank composed of a mass or" synthetic, condensed or polymerized resins con taining continuous layers of tensioned fibrous cord,l each layer formed 01" parallel turns of cord having a zig-Zag arrangement with any portion of each turn extending diagonally ottheturns of an adjacent layer withwhich it contacts. v

ln testimonyvwhereof, I have signed my name tothisspecification. l

A WILLIAM n. ADAMS. 

